Professor Wikipedia defines Delirium as a common and severe neuropsychiatric syndrome characterized by random and fluctuating onsets of attentional deficits and generalized by severe disorganization of behavior. Typically involving cognitive deficits, changes in arousal, perceptual deficits, altered sleep patterns, and psychotic features such as hallucinations and delusions.
This definition of delirium means that almost every person under the age of forty suffers from delirium. Kids grow up watching TV shows and movies that skew their perception of reality and then down a two liter of Mountain Dew at lunchtime. Introduce drugs in high school and you have a recipe for every maladjusted youth between the Atlantic and Pacific.